@MissMuffet - It's great to hear that your company are looking to expand their waste management program. Mine introduced this idea a while back so I can pass on some tips.
The most obvious idea concerns reducing electricity consumption. This can be done by not using lights unless needed, or setting the air conditioner a little higher than you usually do.
Then of course there's the usual recycling bins which many offices and factories may install around the eating areas. (I think maybe you have those in place already.)
The best idea I can pass on came from the waste management service we hired to advise on this issue. They suggested choosing suppliers who package items with the least possible cardboard and plastic possible.
When we put the tender out this was a stipulation, and the response was very positive. it shows that waste management can be recycling, or taking proactive steps to reduce our eco footprint.